The Rise and Fall of Bitcoin The JCDC, or Joint Cyber Defense Collaborative, is a collective of government defense agencies, including the FBI and National Security Agency, and 22 U.S. technology companies that share intelligence about active cyberattacks with one another. The Chinese embassy in Washington did not respond to a request for comment. Chinese officials have previously said China is also a victim of hacking and opposes all forms of cyber attacks. Symantec’s attribution to China is based on instances where components of Daxin were combined with other known, Chinese-linked computer hacker infrastructure or cyberattacks, said Vikram Thakur, a...